Shock-absorber.



G. E. SHIPPEY.

SHOCK ABSORBER.

APPLICATION FILED MAY 13. 1912.

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WITNESSES. INVENTOR.

. GeoryeES/aippey, 1.51M. BY ATTORNEY.

COLUMBIA PLANOGIAPH CO" WAJNINGTON- D. C.

Patented June 10, 1913.

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SHOCK-ABSORBER.

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Specification of Letters Patent.

Patented June 10, 1913.

Application filed May 13, 1912. Serial No. 697,034.

To all whom it may concern Be it known that I, GEORGE E. Snirrnv, acitizen of the United States, residing at Pittsfield, in the county ofBerkshire and State of htiassachusetts, have invented ccrtain new anduseful Improvements in Shock-Absorbers, of which the following is aspecification.

My present invention relates to devices for reducing the oscillations ofthe spring supported portion of spring vehicles and has for its objectto relieve the shocks and jolts incident to travel.

The invention consists in the combination, construction and arrangementof parts, as hereinafter described and set forth in the claims, aspecific useful form of embodiment thereof being shown in theaccompanying drawings, wherein- Figure l is a side View of my deviceoperatively mounted upon the relatively movable parts of a vehicle, aportion of the casing being broken away; Fig. 2, a bottom edge view ofmy device; Fig. 3, a side or face view of the casing frame, and Fig. 4,a detail vertical sectional view of the compression rollers.

The device essentially comprises a casing or spring-receiving port-ion,arms or levers pivotally secured together and extending laterally fromthe casing, and resilient means provided Within the casing for yieldingly opposing the movements of the arms relatively to each other.

As shown, the arms 1, 2, are pivotally secured at their outer ends inany suitable manner and at any convenient points on opposite parts ofthe vehicle, that is to say to the underbody or running portion 3 and tothe overbody or spring-supported portion 41, the inner ends of the arms1, 2, being pivotally secured together, as shown at 5. Each of the arms1., 2, is shown to comprise separate plates 6, 6, 7, 7 which are securedat their inner ends to opposite faces of a ring 8, which forms thecasing frame, and converge at their outer ends which are preterablyperforate and carry in each instance a spreader or washer 9. The ring 8has a body-portion of uniform width and is preferably constructed withan integrally formed diainetral portion or bridge 10, which is increasedin width at its ends to form oppositely arranged shoulders 11, 1'1, 12,12, for the support of leaf-springs 13, 13, preferably provided in pairsand so disposed on opposite sides of the bridge 10 that their lines formscgn'lental sections in the ring.

As shown, the plates (3, (3, of the arm 1 are shaped at their inner endsto conform to the outline of the bridge 10 and are secured thereto faceto face in fixed positions by means of rivets 151-, i l, passed throughsuitable coincident apertures 15, 15, provided in the l'n'idge. Thethickness of the bridge 10, which is n'efcrably less than the height ofthe ring 8, is proportioned to fill the space intervening the inner endsof the arm 1, which are arranged to lie in a plane flush with the edgesof the ring 8, and accordingly one side of the ring is cut away onopposite edges, as at 16, 10, to receive the plates (3, (l. The plates7, 7, of the arm 2 are shown as constructed with enlarged inner ends inthe form of disks conforming to the outline of the ring 8 and areadapted to inclose and render substantially dustproof the interior ofthe casing formed by the ring and tin arm-plates 7, 7, a bolt 5 beingpreferably employed to secure the connected parts in relative position.1 V ithin the ring 8 and journaled upon fixed supports, as the rivets1.7, 17, secured transverscly through the plates 7, 7, are shownbushings 18, 1S, prcfm'ably constructed with polyhedral faces andarranged centrally of the segmental sections of the ring on oppositesides of the bridge 10 and in engagement with the springs 13, 13. Thefaces of the bushings 1S, 18, are designed to atl'ord better wearingqualities, being preferably of tempered metal, and tend to distributethe pressure exerted upon the springs when the arms 1, 2, are actuated.The casing framed by the ring and the plates as afore said is preferablytilled with a non-fluid grease or lubricant to reduce friction of theinclosed parts and to exclude moisture.

In operation, supposing the under-body 8 of the vehicle to be firstactuated toward the overbody t, the outer ends of the arms 1, 2, aremoved toward each other, causing the bushings 18, 18 to depress thesprings 13, f 3, which take into the hollows of the bridge 10, as shownby the dotted lines in Fig. 1, and yieldingly oppose further movement ofthe arms. The recoil action of the overbody 1; is resisted by thesprings in like manner, the bushings 18, 18, being then moved to pointson opposite sides of the spring centers.

I claim 1. In a device of the class described, two arms arrangedconvergently and pivotally secured together at their converging ends, afixed member carried by one of the arms, and a resilient memberinterposed between the fixed member and the pivotal point of the armsand carried by the other of the arms for yieldingly opposing the fixedmember when the arms are moved relatively to each other.

2. In a device of the class described, two arms arranged convergentlyand pivotally secured together at a point near their converging ends,fixed members carried by one of the arms on opposite sides of the pointof pivot, and springs interposed between the fixed members and carriedby the other of the arms for yieldingly opposing the fixed members whenthe arms are moved relatively to each other.

3. A device of the class described comprising levers pivotally securedtogether in convergent relation, a thrust carried by one of the levers,and a spring carried by the other of the levers and disposed between thethrust and the pivotal point of the levers, said thrust being arrangedto flex the spring when the levers are moved relatively to each other,the stress thus exerted by the thrust upon the spring being graduallyincreased to the extreme limit of movement of the levers.

4. In a device of the class described, an arm carrying fixed spacedstops, and a separate arm pivotally secured to said other arm at a pointintermediate said stops and carrying resilient elements interposedbetween the stops and the point of pivot of the arms for yieldinglyopposing the stops when the arms are moved relatively to each other.

5. In a device of the class described, a casing, leaf-springs within thecasing and disposed in parallel spaced relation, compression members forengaging the springs, a radial arm projecting from the casing andarranged to actuate the springs toward the compression members, and aseparate radial arm projecting from the casing at an angle to said otherarm and arranged to actuate the compression members toward the springs,when the arms are moved relatively to each other.

6. In a device of the class described, arms convergently arranged andpivoted together at their converging ends, a ring carried by one of thearms and having its center coincident with the pivotal axis of the arms,springs mounted in the ring in parallel relation and forming segmentstherein on opposite sides of the point of pivot of the arms, and fixedmembers carried by the other of the arms and arranged within the ringsegments and adapted to cause said springs to yield toward each otherwhen actuated by the movement of its supporting arm.

7. In a device of the class described, a ring, leaf-springs secured insubstantially parallel spaced relation within the ring, an arm extendinglaterally from the ring and secured in fixed relation therewith, a separate arm extending laterally from the ring and pivoted to said other armin movable relation to the ring, and thrusts carried on said latter armand arranged to cause said springs to yield toward each other when thearms are moved toward each other.

In testimony whereof I hereto afiix my signature in presence of twowitnesses.

GEORGE E. SHIPPEY.

WVitnesses:

JNo. J. WHITTLESEY, W. E. BAec.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. c.

